Number of n X 2 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 3 0..2 array.

A228972

Number of n X 2 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 3 0..2 array.

Terms

    a(0) =9a(1) =81a(2) =729a(3) =6387a(4) =55887a(5) =488037a(6) =4259277a(7) =37155951a(8) =324050745a(9) =2825717151a(10) =24637772289a(11) =214806377331

External references